Laser Induced Breakdown Spectroscopy (LIBS) - alternative to wet chemistry and micro-XRF
Laser Induced Breakdown Spectroscopy (LIBS) - alternative to wet chemistry and micro-XRF
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激光诱导击穿光谱 (LIBS) - 湿化学和微型 XRF 的替代方案
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
P. Mikuš
中科院分区：
文献类型：
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作者：
Pavlína Marvanová;Tereza Padrtová;R. Opatrilova;J. Pazourek;P. Mikuš
激光诱导击穿光谱(LIBS)为直接研究建筑材料提供了一种替代标准技术的方法。它利用高能脉冲激光烧蚀和汽化少量物质，形成等离子体，并用光学发射光谱研究等离子体辐射。由于原理，所有元素在一次测量中都是可检测的。结合平移工作台或扫描仪系统，在计算结果中考虑了混凝土的异质性。清华S An元素浓度可能与水泥含量相关。用一组参考样品进行校正后，得到了定量结果。该系统是自动化的，允许快速测量，并将错误的可能性降至最低。在BAM，一个实验室LIBS系统已经成功地应用于研究不同离子在建筑材料中的传输过程。测量的空间分辨率可达100μm，测量频率为100 Hz。定量测定氯、硫、碳、钠、钾、锂、氢的浓度。可使用移动系统对桥梁或停车场进行现场分析。它是S现场混凝土修缮工程中混凝土结构状态评估和质量保证的一种工具。在这些工作中，给出了LIBS用于建筑材料自动调查的可能性的概述。
The laser induced breakdown spectroscopy (LIBS) gives an alternative to the standard techniques for the direct investigation of a building material. It utilize a high energy pulsed laser bea m for ablation and vaporization of a small amount of material, a plasma is formed and the plasma radiation is investigated using optical emission spectroscopy. Due to the principal all elements are detectable during one measurement. In combination with a translation stage or scanner system the heterogeneity of concrete is considered in the results. Thu s an element concentration may be correlated to the cement content. After calibration with a set of reference samples quantitative results are obtained. The system is automated and allows rapid measurements and minimizes the possibility of errors. At BAM a laboratory LIBS system has been successful applied for the investigation of transport processes of different ions in building materials. The spatial resolution of the measurement may rich 100 μm and the frequency o f the measurements is 100 Hz. The concentration of chlorine, sulfur, carbon, sodium, potassium, lithium and hydro gen where quantitatively determined. A mobile system for on-site analysis on bridges or parking decks is available. It is a tool for the estimation of the condition of concrete structures and for quality assurance during concrete repair work on-s ite. In these work an overview of the possibilities of LIBS for automated investigation of building materials are given.